Automatic flushing systems



Dec. 4, 1962 J. J. FlLLIUNG AUTOMATIC FLUSHING SYSTEMS Filed June 9,1960 IN VEN TOR. Jncouss J F/LL/UA/G P4 R/(ER 8 CARTER ATTORNEYS3,fifib,3l4 Patented Dec. 4, 1962 ice 3,066,314 AUTOMATEQ FLUSHLNGSYiSTEMfi Jacques J. Filiiung, Chicago, ill, assignor to Sloan ValveCompany, Chicago, iii, a corporation of llilinois Filed June 9, 1961?),her. No. 34,922 22 Claims. (Cl. l -4M} This invention relates in generalto plumbing systems, but more particularly to a system for automaticallycontrolling the operation of flush valves for plumbing fixtures, and theprincipal object of the invention is to provide a new and improvedsystem and arrangement for automatically operating flush valves forurinals in a toilet room.

Another object is to provide an electric flushing system for urinals inwhich the flush valves are automatically operated at predeterminedintervals, and in addition are automatically operated at a faster ratewhen traffic into the toilet room increases.

It is a further object to devise an automatic flushing system forurinals in which the urinals are flushed at two diiferent time rates,one rate automatically by a timing means at predetermined timingintervals, and the other by persons opening the toilet room door to directly cause a flushing operation, independent of the timing means.

Another object of the invention is to provide a new and improvedautomatic flushing system for urinals in which the urinals are flushedat two diiferent time rates; by one timer for example each five minutes,and by another timer at a much faster rate initiated by a person openingthe toilet room door.

In many plumbing installations,especially places frequented by thegeneral public, the urinals usually are provided with flush valveshaving operating handles which a person must manually actuate to flushthe urinal. Many persons, however, for hygienic reasons, are reluctantto touch the flush valve handle, or neglect to do so, and as a resultthe urinal becomes fouled and obnoxious, thereby creating a healthhazard. It is therefore desirable that some means he provided foractuating the flush valves automatically and periodically or by someother means.

While arrangements are known which electrically and periodically causeflush valves to be actuated, such systems usually are arranged to causeflushing operations of the urinals every five or ten minutes, or someother time interval. These relatively long periods between flushes aresatisfactory when trafiic into the toilet room is normal or no oneenters for an extended period. However, in public toilet rooms such asare located at a railroad station or airport, for example, there aretimes, as upon the arrival of a train or plane, when large numbers ofthe arriving passengers will enter the toilet rooms almostsimultaneously. This places a heavy burden upon the urinals and willquickly foul them up if they are only flushed at a normal rate of sayonce every live or ten minutes. A good deal of liquid waste matter willbe deposited by successive persons using a urinal before it is flushed,and this is obnoxious to subsequent users when the intervals betweenflushes are too long.

To overcome the foregoing disadvantages in an automatic flushing system,the invention contemplates the use of an arrangement in Which theurinals are flushed normally and repeatedly at a rate suitable for whatwould be a normal amount of trafi ic into the toilet room, and whichthen supplements this normal flushing rate with a much faster flushingrate when an increased flow or" trafiic takes place.

With the foregoing and other objects in view, the invention consists incertain novel features of construction and arrangement of parts andcircuit connections which will be hereinafter more fully described,claimed and illustrated in the accompanying drawings in which:

FIG. 1 is a diagrammatic and schematic circuit arrangement of anautomatic urinal flushing system in which the urinals are flushedperiodically by a timer and also by the opening of the toilet room door;

FIG. 2 is a modified circuit arrangement in which the opening of thetoilet room door disconnects the timer control until the door closesagain; while FIG. 3 is a further modification and circuit arrangementwherein two different timers are provided, one for normal flushingcontrol, and the other timer controlled by the toilet room door, foraccelerated rate of flushing.

Referring to FIG. 1 of the drawings, there is illustrated a commonplumbing fixture such as a stall urinal 5 provided with a flush valve 6of any well-known type such as a Sloan Royal flush valve having theusual throttle valve 7 for throttling the inlet supply of water to theflush valve 6. The outlet of the flush valve leads directly into theurinal 5 for flushing the same whenever the flush valve is operated. Forthe purpose of actuating the flush valve 6, there is provided anelectrical operating device 8, preferably in the form of a smallfractional horse power motor, as is disclosed in US. Patent 2,552,625,issued May 15, 1951, to J. J. Filliung. In most public washrooms theurinals are usually arranged in batteries as shown, and may all beflushed simultaneously.

For controlling the normal periodic operation of the electrical device 8on each flush valve 6, an electrical timing device showndiagrammatically at 10, is provided. This timer 10 may consist of asmall synchronous electric motor 11 for driving the rotatable cam 12through a suitable gear train, at a speed of about one revolution inevery five minutes. Cam 12 is adapted to close a pair of contacts 13 ateach revolution for approximately five seconds duration. The timer motor11 is connected directly across the alternating current supply linewires 14 and 15 for continuous operation as long as the manual switch 16in line 14 is closed. The cam 12 thereby closes contacts 13 every fiveminutes to establish an operating circuit for the electric actuatingdevice 8 on the flush valve 6, over the Wires 14, switch 16, wire 17,contacts 13, Wire 18, winding of electrical device 8, and back to theother side of the supply line 15. The electrical device 3 is actuatedfor five seconds, causing it to trip the flush valve 6, which in turnpasses a metered amount of water into the urinal 5 and then shuts itselfoil. The urinal 5 is thereby automatically flushed periodically. Sincethe electrical device 23 of urinal 21 is connected in parallel circuitacross wires 15 and 18, the urinal 21 will also be flushed.

The foregoing periodic flushing operation takes place regardless ofwhether a person enters the toilet room or not, and the purpose is toinsure that the urinals do not become dried up to cause waste matter tocling and dry upon the sides of the urinal, and to maintain them in a.sanitary condition at all times.

During periods of increased trafiic into the toilet room, the foregoingfive minute or longer flushing intervals are much too long tosatisfactorily maintain the urinals in a sanitary condition and it istherefore necessary to shorten the flushing intervals. This may beaccomplished by providing the entrance door 22 to the toilet room with aswitch having contacts 23 which are normally biased open when the dooris closed and which are closed whenever the door is opened. Switches ofthis type are well known and consist of a plunger 24 in the door jambactuated by the door to normally hold contact spring 25 open and awayfrom contact spring 26 but to permit closure of contacts 23 when thedoor is opened. Contact spring 26 is connected to wire 17 throughdisconnect switch 27, and contact spring 25 to wire 19. Thus wheneverthe door 22 is opened by a person either entering or leaving the toiletsee ers room, an actuating electrical circuit is completed for theelectrical device 8 to cause the flush valve 6 to be tripped to flushthe urinal 5. The established circuit is over wire 14, switch 16, wire17, disconnect switch 27, springs and 26 through contacts 23, wires 19and 18, the electrical device 8 and back over the wire 15 to the otherside of the line. The urinals 5 and 21 are thereby flushed.

The disconnect switch 27 may be provided in case it would beadvantageous to have an attendant close the switch 27 whenever an influxof heavy tratfic into the toilet room warrants the increase in flushingrate. At all other times with switch 27 open, the door switch would beineffective and flushing would only take place under control of thetimer 10. The line switch 16 is closed at all times except when repairor mantenance are necessary and the equipment is to be shut down.

it is desirable that the door 22 be controlled to slowly close toprevent slamming, and advantage is taken of this fact to properly efiectthe operation of the electrical device 8. Most all public and othertoilet room doors are equipped with a suitable slow-closing check asindicated at 30. These door checks 30 are usually regulated to permitthe door 22 to slowly close in about five seconds and this time is justsuiiicient to enable the operating device 8 on the flush valve to beproperly actuated according to the aforesaid Patent No. 2,552,625,whenever the door contacts 23 are closed.

With the foregoing arrangement, it is seen that successive door openingsat close intervals during heavy traific into the toilet room will causecorresponding fast flushing operations of the urinals to keep themclean. It will be understood also that each time a person enters thetoilet room the urinal will be flushed immediately or is flushing whenhe approaches it, and when he leaves and opens the door 22 to go out theurinal will be ilushed again. During heavy trafiic flow into and out ofthe toilet room, the

urinals will therefore be flushed almost continuously and that is a mostdesirable condition under such circumstances. There may be occasionswhen the flushing control from both the door opening and from the timer10 will overlap, but this merely results in a slightly longerenergization of the electrical device 8 and does not efiect theoperation of the flush valve 6. During long intervals when no one entersthe toilet room, the urinals are flushed periodically by the timer 10 tokeep them clean, as pointed out.

In many cases toilet rooms are provided with two separate entrancedoors, one for the use of the general public and the other for use byoffice personnel. The door used by the public would then be equippedwith thedoor switch for fast flushing intervals, while the timer 10would be effective to flush the urinals every five minutes for personnelusing the other door not equipped with a door switch, thus insuringconstant cleanliness and sanitary condition of the urinals under allpossible conditions of trafiic.

In the modification, FIG. 2, the arrangement is similar to FIG. 1,except that the door switch is provided with three contact springs. Whenthe door 22 is closed contact springs 31 and 32 are closed so that thetimer 10 is effective to periodically flush the urinals 5 and 21 over acircuit path including line wire 14, switch 16, contact springs 13(closed every five minutes), wire 34, contact springs 31 and 32, wire35, through the electrical device '8 and back to the other side of theline over wire 15.

However, whenever the door 22 is opened, contact spring 31 is moved awayfrom contact spring 32 and closes upon contact spring 33. This closesthe actuating circuit for electrical device 8 over a circuit path,including wire 17, contact springs 33 and 32, and wire 35 to theelectrical device 8. Accordingly, whenever the door 22 is opened thetimer 10 is cut out to eliminate the possibility of overlapping flusheswhen both the timer and door switch are simultaneously closing theoperating circuits of the 4 1 electrical device 3. The possibility of aprolonged fiushing action by the flush valve 6 is thereby reduced.

In order to eliminate the double flushing action by the door switch asin FIG. 1, such as occurs when the person enters the toilet room andagain when he leaves, the modifications of FIG. 2 contemplate the use oftwo separate doors, as is sometimes provided in public toilet rooms. Thedoor 36 would then be the entrance door and would not have the doorswitch control on it. The exit door 22, however, is equipped with a doorswitch as shown and will be opened only by a person leaving the toiletroom. in such an installation a flushing action will only take placeafter a person has used the urinal. This effects a saving of at leasthalf the consumption of water. The fewer flushes during heavy trafficperiods into the toilet room would still be adequate to maintain asanitary condition in the urinals.

Referring now to FIG. 3 in this modification of the invention, the samecontrol of the fiushvalves by the timer 19 is provided as in FIG. 1. Inaddition, a second timer 40 is included to provide for the acceleratedflushing rate. Timer 4% is directly controlled bythe door switchcontacts 23. The timer 10 closes its contacts 13 as before, every fiveminutes for example, to operate the electrical device 8. Timer 40,however, is provided with a driving motor 41 having two sets of cams,one cam 42 has a lobe which in its normal position holds contact springs43 and 44 spaced apart, and the other cam 45 has a number of lobes 46each of which is arranged to close contacts 47 when engaging the same.The lobes 46 of cam 45 are preferably spaced so they close contacts 47about one minute apart.

With the foregoing circuit arrangement, the timer motor 41 is given aninitial energization when the door 22 is opened, over a circuit pathincluding line wire 14, switch 16, wire 17, door switch contacts 23,wire 19, winding of timer motor 41, to the other side of the line 15.Only a short movement of the cam 42 by the motor causes contact springs43 and 44 to close and remain closed for a five minute period until thelobe of cam 42 again comes around and opens the contacts 43. As soon ascontacts 43 and 44 are closed, a second circuit for the timer motor 41is established over wires 14, 49, contact springs 44 and 43, wire 50,winding of motor 41 to the line 15. It will be clear from this that oncethe motor 41 is started, it will continue to run until contacts 43 and44 are opened, again stopping the timer. In the interval that the timer4% is operating any repeated opening of the door 22 will be ineffectiveupon the timer motor 41 be cause its circuit is now closed over contacts43 and 44, and wires 49 and Sti. The door contacts 23 only start thetimer into operation, while the timer stops its own operation. Duringthe rotation of cam 42, cam 45 also closes the contacts 47 with itslobes 46 at one minute intervals, to operate the electrical device 8,over a circuit path including wire 14, 49, contacts 47, wire 18,electric device 8, and back over wire 15.

The advantages of the system in FIG. 3 are that during heavy trafi'icinto the toilet room the timer 40 will provide one minute flushingperiods, while at all other times the timer 10 provides five minutetiming intervals. Frequent flushing intervals are thereby attainedwithout relying upon direct operation from the door-openings as in FIG.1 operation and a saving in water is thereby attained.

While a number of modifications of the invention are illustrated anddescribed, it will be appreciated that other variations of the same maybe made by those skilled in the art, and it is therefore desired thatthe invention be not limited to the precise disclosures made, but onlyby the scope of the appended claims.

What is'claimed is:

1. In an automatic flushing system for a plumbing fixture located in atoilet room equipped with a door, a

flush valve for flushing said plumbing fixture, an electrical device foroperating said flush valve, a first timing device connected to saidelectrical device for operating the same at periodic intervals, a secondtiming device including electrical connections for operating saidelectrical device at different periodic intervals from said first timingdevice, a door switch controlled by the opening of said door, a powersource and other electrical connections between said door switch andsaid second timing device whereby said second timing device is startedinto operation only when said toilet door is opened, said electricalconnections including a control switch in each of said timing devicesconnected in circuit with said electrical device and said power source,and said door switch connected in circuit with said second timing deviceand said power source.

2. In an automatic flushing system for a plumbing fixture located in atoilet room having a door therein, a flush valve on said plumbingfixture for flushing the same, an electrical device on said flush valvefor operating the same, a first timing device for periodically operatingsaid electrical device at certain intervals, at second timing device forperiodically operating said electrical device at intervals differentfrom said first timing device, circuit connections between said firsttiming device and said electrical device for directly operating saidelectrical device, a door switch closed Whenever the toilet room door isopened, a power source and circuit connections between said door switchand said second timing device whereby said second timing device isstarted into operation when said door is opened to close said doorswitch, said circuit connections including a control switch in each ofsaid timing devices connected with said electrical device and said powersource, and said door switch connected with said second timing deviceand said power source.

3. in an automatic flushing system for a plumbing fixture located in atoilet room having a door therein, an electrically operated flush valvefor flushing said plumbing fixture, a first timing device and a secondtiming device for controlling said electrically operated flush valve,circuit connections between said first timing device and saidelectrically operated flush valve whereby said flush valve is operatedcontinuously at certain periodic intervals, a door switch closedwhenever said door is opened, a power source circuit connection betweensaid door switch and said second timing device whereby said fiush valveis operated at different intervals from said first timing device onlywhen said door switch is closed by the opening of said toilet room door,and means in said second timing device for stopping its operation afterone complete cycle of operation, said circuit connections including acontrol switch in each of said timing devices connected with saidelectrically operated flush valve and said power source, said doorsWitch connected with said second timing device and said power source.

4. In an automatic flushing system for a plumbing fix- ,ture located ina toilet room having a door therein, an

electrically operated flush valve for flushing said fixture, a firsttiming device for controlling the operation of said flush valve, a doorswitch closed by the opening of said door for controlling the operationof said first timing device, means in said first timing device formaintaining the operation thereof and for stopping the same after apredetermined time interval independent of any repeated opening of saiddoor and the consequent closing of said door switch, said first timingdevice effective to cause said flush valve to be operated apredetermined number of times during each operation of said first timer,a second timer also controlling the operation of said flush valve and atpredetermined time intervals dilfering from said first timer, saidsecond timer being controlled independent of said door switch, a powersource, a control switch in each of said timing devices connected withsaid electrically operated flush valve and said power source, said doorswitch connected with said first timing device and said power source.

5. An automatic flushing system for providing fast and slow tfiushing ofa plumbing fixture located in a room having a door, said systemincluding, in combination, a flush valve on a plumbing fixture forflushing the same, an electrical device on said flush valve foroperating the same, a first electrical circuit between a source ofelectric power and the electrical device, a timing device in the firstelectrical circuit leading to the electrical device, said timing device,when actuated, being operable to substantially regularly actuate theelectrical device, and thereby the flush valve, a door switch closedupon opening of said door, and a second electrical circuit leading tothe electrical device, said door switch being located in the secondelectrical circuit, said door switch, when closed, completing the secondelectrical circuit whereby said electrical device may be actuated, andthereby the flush valve, independently of operation of the timingdevice.

6. The flushing system of claim 5 further including a manual switch inthe second electrical circuit, effective to disconnect said secondelectrical circuit from the electrical device whereby control of saidelectrical device is provided solely by said timing device and the firstelectrical circuit.

7. In an automatic flushing system for flushing a plumbing fixturelocated in a toilet room and having a door therein, a flush valve forflushing said plumbing fixture, an electrical device for operating saidflush valve, a door switch closed by the opening of said door, anelectrical circuit between said door switch and said electrical device,and connectable to a power source, whereby said fixture may be flushedwhen said door is opened, a timing device for also actuating saidelectrical device at in tervals independent of said door switch, saidtiming device actuating a control switch, and an additional electricalcircuit between the control switch and the electrical device, andconnectable to the power source, whereby said electrical device isoperated when said control switch is closed. 8. The automatic flushingsystem of claim 7 further characterized in that the door switch and thecontrol switch are connected in parallel with one another, and both areconnected in series with the electrical device. 9. In an automaticflushing system for flushing a plumbing fixture located in a toilet roomand having a door therein, a flush valve for flushing said plumbingfixture, an electrical device for operating said flush valve, a doorswitch closed by the opening of said door, an electrical circuit betweensaid door switch and said electrical device, and connectable to a powersource, whereby said fixture is flushed when said door is opened, atiming device for also actuating said electrical device at intervalsindependent of said door switch, said timing device actuating a controlswitch, an additional electrical circuit between the control switch and.the electrical device, and connectable to the power source, whereby saidelectrical device is operated when said control switch is closed, andmeans for disconnecting the control of said electrical device by saidtimer when said door switch is closed.

10. In an automatic flushing system for a plumbing fixture located in atoilet room having a door therein, a flush valve for flushing saidplumbing fixture, an electrical device on said flush valve for operatingsaid flush valve, a timing device for periodically operating saidelectrical device, a door switch on said door actuated when said door isopened, said door switch having normally open contacts which are closedwhen said door is opened, a circuit between said normally open doorcontacts and said electrical device whereby said electrical device isoperated when said door is opened, said door switch also having normallyclosed contacts which are opened whenever said door is opened, and acircuit between said normally closed cont-acts and said timing device,whereby said timer operates said electrical device through said lastcontacts when said door is closed, and whereby said timing device isdisconnected from said last circuit by said last contacts when said dooris opened.

11. In an automatic flushing system for flushing a plumbing fixturelocated in a toilet room having an exit door therein, a flush valve forflushing said plumbing fixture, an electrical device for operating saidflush valve, a door switch closed by the opening of said exit door, acircuit between said door switch and said electrical device, andconnectable to a power source, whereby said fixture is flushed when saidexit door is opened, a timing device for also actuating said electricaldevice at intervals independent of said exit door, saidtiming deviceactuating a control switch, an additional circuit between the controlswitch and electrical device, and connectable to the power source,whereby said electrical device is operated when said control switch isclosed, said exit door switch being effective to disconnect said timerfrom its control of said flush valve whenever said door switch isactuated by said exit door.

12. In an automatic flushing system for flushing a plumbing fixturelocated in a toilet room having a separate entrance door and exit doortherein, a flush valve for flushing said plumbing fixture, an electricaldevice for operating aid flush valve, a door switch closed. by theopening of said exit door, a circuit between said door switch and saidelectrical device, and connectable to a power source, whereby saidfixture is flushed when said exit door is opened, a timing device foralso actuating said electrical device at intervals independent of saidexit door, said timing device actuating a control switch, an additionalcircuit between the control switch and electrical device, andconnectable to the power source, whereby said electrical device isoperated when said control switch is closed, and means efiective todisconnect said timer from its control of said flush valve whenever saiddoor switch is actuated by said exit door, said last means comprising anormally closed exit door switch in said additional circuit which, whenopened by opening of the exit door, disconnects the timing device fromthe electrical device.

13. In an automatic flushing system for flushing a plumbing fixturelocated in a toilet room having a door therein, a flush valve forflushing said plumbing fixture, an electrical device on said flush valvefor operating the same, a timing device for periodically operating saidelectrical device, a door switch on said door closed when said door isopened said door switch operating said electrical device each time saiddoor is opened and said door switch is closed, and means on said doorswitch for disconnecting the control of said timer from said electricaldevice whenever said door switch is closed.

14-. In an automatic flushing system for flushing a plumbing fixturelocated in a toilet room having a door therein, a flush valve on saidplumbing fixture for flushing the same, an electrical device on saidflush valve for operating the same, an electrical timer for periodicallycausing the operation of said electrical device, a door switch on saiddoor which is closed whenever said door is opened, said door switchoperating said electric device each time said door switch is closed,circuit connections extending between said timer and said electricaldevice and between said door switch and said electrical device, andmeans for disconnecting the control of said electrical device by saidtimer each time said door switch is closed.

15. In an automatic flushing system for a plumbing fixture located in atoilet room having a door therein, a flush valve for flushing saidplumbing fixture, an electrical device on said flush valve for operatingsaid flush valve, a timing device for periodically operating saidelectrical device, a door switch on said door controlled when said dooris opened, said door switch having normally open contacts which areclosed when said door is opened, circuit connections between saidnormally open door contacts and said electrical device whereby saidelectrical device is operated when said door is opened, said door switchalso having normally closed contacts which are opened whenever said dooris opened, and circuit connections between said normally closed contactsand said timing device, whereby said timer operates said electricaldevice through said last contacts when said door is closed, and wherebysaid timing device is disconnected from said last circuit connections bysaid last contacts when said door is opened.

16. In an automatic flushing system for flushing a plumbing fixturelocated in a toilet room having a separate entrance door and exit doortherein, an electrical operated flush valve for flushing said plumbingfixture, a door switch on said exit door closed whenever said exit dooris opened by a person leaving the toilet room, electrical connectionsbetween said door switch and said flush valve whereby said fiush valveis operated by each closure of said exit door switch, a timing device,and electrical circuit connections between said timing device and saidflush valve whereby said flush valve is operated at periodic intervalsby said timer independent of closure of said exit door.

17. In an automatic flushing system as claimed in claim 16, theprovision of means controlled by said exit door switch whereby saidtimer is disconnected from its control of said flush valve whenever saiddoor switch is actuated by said exit door.

18. In an automatic flushing system for plumbing fixtures located in atoilet room havingan entrance door therein, said toilet room beingsubject at times to normal traflic through said door and for increasedtraffic at certain other times, electrical operated fiush valves forflushing said plumbing fixtures, a timing device effective toperiodically operate said electrical operated flush valves at all times,a door switch on said door controlled by the opening and closing of saidentrance door, the closing of said door switch being effective to causethe operation of said electrical operated flush valves each time thedoor is opened and each time it is closed to accommodate increasedtrafiic, and a manual actuated switch for disconnecting said door switchfrom control of said electrical operated flush valve during periods ofnormal traffic into said toilet room.

19. In an automatic flushing system for flushing a plumbing fixturelocated in a toilet room having a door therein, a flush valve on saidplumbing fixture for flushing the same, an electrical device on saidflush valve for operating the same, a timing device for controlling theactuation of said electrical device, a switch on said door actuated bythe opening of said door, a power source, and electrical connectionsbetween said timing device, said door switch and said electrical device,whereby said electrical device is operated periodically by said timingdevice and additionally each time said door is opened and said doorswitch is actuated, said electrical connections including a controlswitch in said timing device connected in circuit with said door switchand both switches connected in series circuit with said electricaldevice and said power source.

20. In an automatic flushing system for flushing a plumbing systemlocated in a toilet room and having a door therein, a flush valve forflushing said plumbing fixture, an electrical device for operating saidflush valve, a door switch closed by the opening of said door,electrical connections between said door switch and said electricaldevice whereby said fixture is flushed each time said door is opened, apower source, and a timing device for also actuating said electricaldevice at periodical intervals independent of said door switch, saidelectrical connections including a control switch in said timing deviceconnected in circuit with said door switch and both switches connectedin series circuit with said electrical device and said power source.

2-1. In an automatic flushing system for flushing a plumbing fixturelocated in a toilet room having a door therein and a door check on saiddoor to permit the slow closing of said door, a door switch closed bysaid door when the door is opened, said door switch being held open forat least five seconds as said door slowly closes under control of saiddoor check, the closure of said door resulting in the opening of saiddoor switch, a flush valve for flushing the plumbing fixture, anelectric motor on said flush valve for operating said flush valve, saidelectric motor having a cam and gear train arrangement requiring atleast five seconds for said gear train to rotate said cam for onerevolution, said carn causing the actuation of said flush valve, andelectric circuit connections between said electric motor and said doorswitch whereby said electric motor is caused to be energized by saiddoor switch for a time length of not less than five seconds.

22. In an automatic flushing system for flushing a plumbing fixturelocated in a toilet room equipped with a door, said door having a doorcheck thereon for permitting said door to slowly close over a timeperiod of not less than five seconds, a door switch which is closed bythe opening of said door for the time period said door check allows saiddoor to slowly close, a flush valve on said plumbing fixture forflushing the same, an electric motor on said flush valve for operatingthe same, said electric motor requiring an electric energizing timeperiod of at least five seconds to trip said flush valve, and electricalconnections between said door switch and said electric motor for causingthe operation of said electric motor for at least five seconds duration.

References Cited in the file of this patent UNITED STATES PATENTS1,875,983 Bourdet Sept. 6, 1932 2,507,966 Filliung May 16, 19502,590,147 Bellamy Mar. 25, 1952 2,688,141 Filliung Sept. 7, 19542,786,210 Fraser Mar. 26, 1957

